Compilare: user.cpp: In destructor ‘tractor::~tractor()’: user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘void tractor::generate_children()’: user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp:56: warning: comparison between signed and unsigned integer expressions user.cpp:57: warning: comparison between signed and unsigned integer expressions user.cpp:64: warning: comparison between signed and unsigned integer expressions user.cpp:65: warning: comparison between signed and unsigned integer expressions user.cpp:66: warning: comparison between signed and unsigned integer expressions user.cpp:67: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘int tractor::find(int, int)’: user.cpp:100: warning: comparison between signed and unsigned integer expressions user.cpp:103: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘int tractor::matchup(int, int, int (*)[16])’: user.cpp:134: warning: comparison between signed and unsigned integer expressions user.cpp:148: warning: comparison between signed and unsigned integer expressions user.cpp:149: warning: comparison between signed and unsigned integer expressions user.cpp:150: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘void tractor::clear_M()’: user.cpp:196: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:228: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long long int’ user.cpp:229: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long long int’ user.cpp:232: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.cpp:207: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:208: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:213: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:218: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:223: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result